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Luo W, Aruma A, Li M, Wang J, Xie J, Xiao X, Shen Y, Niu L, Wang X, Zhou X. Four-year visual outcomes and optical quality of SMILE and implantable collamer lens V4c (EVO-ICL) implantation for high myopia: a retrospective study. BMC Ophthalmol 2023; 23:341. [PMID: 37525155 PMCID: PMC10392000 DOI: 10.1186/s12886-023-03050-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 06/18/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND To compare the 4-year visual outcomes of implantable collamer lens V4c (EVO-ICL) implantation and small incision lenticule extraction (SMILE) for high myopia and astigmatism. METHODS This retrospective case study included 64 eyes of 40 patients. These patients with preoperative manifest refraction spherical equivalent (SE) between - 6.00 and - 10.00 diopters (D) were screened from the database of SMILE and EVO-ICL implantation procedures in 2015. The ICL group [32 eyes of 19 patients (mean age, 29.6 ± 6.3 years); mean SE, -8.71 ± 1.06 D] and SMILE group [32 eyes of 21 patients (mean age, 27.7 ± 5.6 years); mean SE, -8.35 ± 0.65D] were compared. All patients were then prospectively examined at a four-year follow-up for routine postoperative examinations, higher-order ocular aberrations, retinal image quality and a questionnaire. RESULTS The safety indexes were 1.15 ± 0.14 and 1.22 ± 0.21 (P = 0.36) for the SMILE and ICL groups, respectively. No eyes lost two or more lines of CDVA in either group. The efficacy indexes were 0.97 ± 0.16 and 0.96 ± 0.19 (P = 0.87), respectively. Twenty-three eyes (72%) in ICL and 26 eyes (81%) in SMILE groups were within ± 0.5 D of the attempted SE (P < 0.01). ICL-treated eyes had significantly less spherical aberration and coma (P < 0.01 and < 0.05, respectively) postoperatively. Halos were the prevalent visual disturbance in both groups. CONCLUSION SMILE and EVO-ICL implantation provided safe and effective correction of high myopia. SMILE showed slightly better long-term predictability. Mild postoperative visual disturbances were observed after ICL and SMILE at 4-year follow-up.
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Affiliation(s)
- Wuqiang Luo
- Visual Science and Optometry Center, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Aruma Aruma
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China
| | - Meiyan Li
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China
| | - Jing Wang
- Aier Eye Hospital Group, Aier Eye Hospital of Wuhan University, 430063, Wuhan, Hubei Province, China
| | - Jing Xie
- Department of Ophthalmology, Shenzhen Key Laboratory of ENT, Institute of ENT Shenzhen, Longgang ENT hospital, 518172, Shenzhen, China
| | - Xin Xiao
- Visual Science and Optometry Center, the People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530021, Guangxi Zhuang Autonomous Region, China
| | - Yang Shen
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China
| | - Lingling Niu
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China
| | - Xiaoying Wang
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China
| | - Xingtao Zhou
- Department of Ophthalmology, NHC Key Laboratory of Myopia, Shanghai Research Center of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, 200433, Shanghai, China.
- Department of Ophthalmology and Optometry, Myopia Key Laboratory of the Health Ministry, Eye and ENT Hospital of Fudan University, No.83 Fenyang Road, 200031, Shanghai, People's Republic of China.
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Ye Y, Aruma A, Zhao W, Lu ZL, Zhou X, Zhao J. A novel quick contrast sensitivity function test in Chinese adults with myopia and its related parameters. Graefes Arch Clin Exp Ophthalmol 2023:10.1007/s00417-023-06010-7. [PMID: 36808230 DOI: 10.1007/s00417-023-06010-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 01/26/2023] [Accepted: 02/06/2023] [Indexed: 02/23/2023] Open
Abstract
PURPOSE This study is to investigate the contrast sensitivity function (CSF) using the quick CSF (qCSF) test in Chinese adults with myopia. METHODS This case series study included 320 myopic eyes of 160 patients (mean age 27.75 ± 5.99 years) who underwent a qCSF test for acuity, area under log CSF (AULCSF), and mean contrast sensitivity (CS) at 1.0, 1.5, 3.0, 6.0, 12.0, and 18.0 cycle per degree (cpd). Spherical equivalent, corrected-distant visual acuity (CDVA), and pupil size were recorded. RESULTS The spherical equivalent, CDVA (LogMAR), spherical refraction, cylindrical refraction, and the scotopic pupil size of the included eyes were - 6.30 ± 2.27 D (- 14.25 to - 0.88 D), 0 ± 0.02, - 5.74 ± 2.18 D, - 1.11 ± 0.86 D, and 6.77 ± 0.73 mm, respectively. The AULCSF and CSF acuity were 1.01 ± 0.21 and 18.45 ± 5.39 cpd, respectively. The mean CS (log units) at six different spatial frequencies were 1.25 ± 0.14, 1.29 ± 0.14, 1.25 ± 0.14, 0.98 ± 0.26, 0.45 ± 0.28, and 0.13 ± 0.17, respectively. A mixed effect model showed significant correlations between age and acuity, AULCSF, and CSF at 1.0, 12.0, and 18.0 cpd. Interocular CSF differences were correlated with the interocular difference of spherical equivalent, spherical refraction (at 1.0 cpd, 1.5 cpd), and cylindrical refraction (at 12.0 cpd, 18.0 cpd). The lower cylindrical refraction eye had higher CSF compared with the higher cylindrical refraction eye (0.48 ± 0.29 vs. 0.42 ± 0.27 at 12.0 cpd and 0.15 ± 0.19 vs. 0.12 ± 0.15 at 18.0 cpd). CONCLUSIONS The age-related decrease in contrast sensitivity is at low and high spatial frequencies. Higher-degree myopia may show a decrease in CSF acuity. Low astigmatism was noted to affect the contrast sensitivity significantly.
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Affiliation(s)
- Yuhao Ye
- Department of Ophthalmology and Optometry, Eye & ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Aruma Aruma
- Department of Ophthalmology and Optometry, Eye & ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Wuxiao Zhao
- Department of Ophthalmology and Optometry, Eye & ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Zhong-Lin Lu
- Division of Arts and Sciences, NYU Shanghai, Shanghai, China; Center for Neural Science and Department of Psychology, New York University, New York, NY, USA.,NYU-ECNU Institute of Brain and Cognitive Science, NYU Shanghai, Shanghai, China
| | - Xingtao Zhou
- Department of Ophthalmology and Optometry, Eye & ENT Hospital, Fudan University, Shanghai, China. .,NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China. .,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China. .,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China.
| | - Jing Zhao
- Department of Ophthalmology and Optometry, Eye & ENT Hospital, Fudan University, Shanghai, China. .,NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, 200031, China. .,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China. .,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China.
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Zéboulon P, Panthier C, Rouger H, Bijon J, Ghazal W, Gatinel D. Development and validation of a pixel wise deep learning model to detect cataract on swept-source optical coherence tomography images. JOURNAL OF OPTOMETRY 2022; 15 Suppl 1:S43-S49. [PMID: 36229338 PMCID: PMC9732477 DOI: 10.1016/j.optom.2022.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/17/2022] [Accepted: 08/21/2022] [Indexed: 06/16/2023]
Abstract
PURPOSE The diagnosis of cataract is mostly clinical and there is a lack of objective and specific tool to detect and grade it automatically. The goal of this study was to develop and validate a deep learning model to detect and localize cataract on Swept Source Optical Coherance Tomography (SS-OCT) images. METHODS We trained a convolutional network to detect cataract at the pixel level from 504 SS-OCT images of clear lens and cataract patients. The model was then validated on 1326 different images of 114 patients. The output of the model is a map repreenting the probability of cataract for each pixel of the image. We calculated the Cataract Fraction (CF), defined as the number of pixel classified as "cataract" divided by the number of pixel representing the lens for each image. Receiver Operating Characteristic Curves were plotted. Area Under the Curve (ROC AUC) sensitivity and specitivity to detect cataract were calculated. RESULTS In the validsation set, mean CF was 0.024 ± 0.077 and 0.479 ± 0.230 (p < 0.001). ROC AUC was 0.98 with an optimal CF threshold of 0.14. Using that threshold, sensitivity and specificity to detect cataract were 94.4% and 94.7%, respectively. CONCLUSION We developed an automatic detection tool for cataract on SS-OCT images. Probability maps of cataract on the images provide an additional tool to help the physician in its diagnosis and surgical planning.
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Affiliation(s)
- Pierre Zéboulon
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France.
| | - Christophe Panthier
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France
| | - Hélène Rouger
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France
| | - Jacques Bijon
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France
| | - Wassim Ghazal
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France
| | - Damien Gatinel
- Department of Ophthalmology, Rothschild Foundation, 25 Rue Manin, Paris 75019, France
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de Asís Bartol-Puyal F, Giménez G, Méndez-Martínez S, Altemir I, Larrosa JM, Polo V, Pablo L. Bias of near-infrared light in evaluation of patients implanted with multifocal intraocular lenses. Int Ophthalmol 2021; 41:3171-3181. [PMID: 34032978 DOI: 10.1007/s10792-021-01882-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 05/12/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To compare visual quality between subjective tests and optical devices using near-infrared (NIR) light in patients implanted with monofocal, multifocal and enlarged depth-of-focus (EDoF) intraocular lenses (IOLs). METHODS Cross-sectional study enrolling patients aged between 55 and 75 (axial length between 22 and 25 mm) bilaterally implanted with Tecnis IOLs (Johnson & Johnson) four months previously: 40 patients (80 eyes) with monofocal ZCB00, 41 patients (82 eyes) with bifocal diffractive ZMB00 and 48 patients (96 eyes) with EDoF Symfony. They were examined using subjective and objective tests. The subjective tests comprised visual acuity (VA) with ETDRS charts, contrast sensitivity (CS) with Pelli-Robson and CSV-1000E tests, and clear vision range (CVR). The objective tests using NIR light were performed with the KR-1 W wavefront analyzer and the OQAS. RESULTS In the subjective tests, the monofocal group achieved the best outcomes in some of the VA and CS sections, while the bifocal group obtained the worst outcomes in some of the CS sections. In the objective tests, the bifocal group achieved the best results for VA and CS. Discrepancies between pseudoaccommodation range and CVR were found in the bifocal and EDoF groups. CONCLUSIONS Assessment of visual quality using NIR light implies greater bias for diffractive lenses than for EDoF lenses. This bias may be even greater with devices using longer light wavelengths or Hartmann-Shack technology. The difference in wavelength between NIR and visible light leads to dimming of near-vision focus and magnification of distance focus.
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Affiliation(s)
- Francisco de Asís Bartol-Puyal
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain. .,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain. .,University of Zaragoza, Zaragoza, Spain.
| | - Galadriel Giménez
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain
| | - Silvia Méndez-Martínez
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain
| | - Irene Altemir
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain
| | - José Manuel Larrosa
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain
| | - Vicente Polo
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain
| | - Luis Pablo
- Ophthalmology Department, Miguel Servet University Hospital, Zaragoza, Spain.,Miguel Servet Ophthalmology Research Group (GIMSO), Institute for Health Research Aragón (IIS Aragón), Zaragoza, Spain.,University of Zaragoza, Zaragoza, Spain.,Biotech Vision SLP, University of Zaragoza, Zaragoza, Spain
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5
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Tomás J, Piñero DP, Alió JL. Intra‐observer repeatability of optical quality measures provided by a double‐pass system. Clin Exp Optom 2021; 95:60-5. [DOI: 10.1111/j.1444-0938.2011.00660.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Javier Tomás
- Vissum/Instituto Oftalmológico de Alicante, Spain
| | - David P Piñero
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Spain
| | - Jorge L Alió
- Division of Ophthalmology, Universidad Miguel Hernández, Alicante, Spain. E‐mail:
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6
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Aruma A, Li M, Choi J, Miao H, Wei R, Yang D, Yao P, Sun L, Wang X, Zhou X. Visual outcomes after small incision lenticule extraction and implantable collamer lens V4c for moderate myopia: 1-year results. Graefes Arch Clin Exp Ophthalmol 2021; 259:2431-2440. [PMID: 33661364 DOI: 10.1007/s00417-020-04982-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/28/2020] [Accepted: 10/12/2020] [Indexed: 12/20/2022] Open
Abstract
PURPOSE To compare 1-year visual outcomes after implantable collamer lens V4c (EVO-ICL) implantation and small incision lenticule extraction (SMILE) for moderate myopia. METHODS In this retrospective study, 67 eyes of 39 patients with a preoperative manifest refraction spherical equivalent between - 3.00 and - 6.00 diopters (D) were selected from a database of SMILE and ICL implantation procedures performed from April 2018 to December 2018. Thirty-two eyes of 20 patients underwent EVO-ICL implantation, and 35 eyes of 19 patients underwent SMILE. At the routine 1-year follow-up appointment, all selected patients were examined for higher-order ocular aberrations, retinal image quality, and a quality of vision (QoV) questionnaire. This data was then analyzed. RESULTS No complications were observed. Uncorrected and corrected visual acuities at 1 year after surgery were - 0.13 ± 0.07 and - 0.15 ± 0.06 logMAR in the SMILE group, and - 0.10 ± 0.07 and - 0.16 ± 0.05 logMAR in the ICL group. Twenty-nine eyes (90.6%) which underwent ICL implantation and 34 eyes (97.1%) which underwent SMILE were within ± 0.5 D of the attempted spherical equivalent (P = 0.49). Changes in coma after ICL were significantly less than after SMILE (P = 0.002). The leading complaints after ICL and SMILE were halos (84.4%) and blurred vision (65.7%), respectively. CONCLUSIONS Both SMILE and ICL implantation provided good safety, efficacy, and predictability in correcting moderate myopia. The subjective visual complaints consisted mainly of halos after ICL and starbursts and blurred vision after SMILE.
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Affiliation(s)
- Aruma Aruma
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Meiyan Li
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Joanne Choi
- Kresge Eye Institute/Department of Ophthalmology, Wayne State University, Detroit, MI, USA
| | - Huamao Miao
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Ruoyan Wei
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Danjuan Yang
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Peijun Yao
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Ling Sun
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Xiaoying Wang
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China.,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China.,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Xingtao Zhou
- Department of Ophthalmology and Optometry, Eye and ENT Hospital, Fudan University, Shanghai, China. .,NHC Key Laboratory of Myopia (Fudan University), No. 83 Fenyang Road, Shanghai, 200031, People's Republic of China. .,Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.
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7
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Pérez-Corral J, Cardona G, Piñero DP, Aradilla Y, García M. Should Overnight Orthokeratology Patients Wear Their Lenses During Their Afternoon Nap? Eye Contact Lens 2021; 47:91-97. [PMID: 32701767 DOI: 10.1097/icl.0000000000000732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE The purpose of this study was to evaluate changes in visual acuity, corneal curvature, elevation, pachymetry, and objective quality of vision of experienced orthokeratology patients using their contact lenses during a simulated 30-min afternoon nap. METHOD Twelve patients aged 30.8±8.3 years were recruited for the study, with a history of overnight orthokeratology of 27.4±23.0 months. Patients were instructed to close their eyes for 30 min while wearing their contact lenses or without lenses. Anterior corneal curvature, elevation, and corneal pachymetry were assessed with the Pentacam Scheimpflug System at 17 predefined corneal locations, and the HD Analyzer (Terrassa, Spain) was used to measure objective quality of vision. Measurements were conducted before eye closure (baseline), immediately after eye opening/lens removal (M1), and 30 min later (M2). RESULTS No statistically significant differences were found in anterior corneal curvature and elevation between baseline values and M1 or M2, with and without contact lenses. Corneal swelling at M1 was greater without contact lenses (change in central corneal thickness of 2.3%±3.1%, P=0.001) than with contact lenses (1.7%±1.3%, P<0.001). Recovery at M2 was slower when lenses were worn. A statistically significant improvement in objective quality of vision and visual acuity was found only when patients napped with their lenses. CONCLUSIONS Even if no significant changes were found in corneal curvature and elevation, patients of overnight orthokeratology may benefit from using their contact lenses during their afternoon nap in terms of objective quality of vision and visual acuity.
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Affiliation(s)
- Joan Pérez-Corral
- Department of Optics and Optometry (J.P.-C., G.C.), Universitat Politècnica de Catalunya, School of Optics and Optometry, Terrassa, Spain; Department of Optics, Pharmacology, and Anatomy (D.P.P.), University of Alicante, Alicante, Spain; and Department of Contact Lenses (Y.A., M.G.), Institut Català de Retina, Barcelona, Spain
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Buffault J, Zéboulon P, Liang H, Chiche A, Luzu J, Robin M, Rabut G, Labetoulle M, Labbé A, Baudouin C. Assessment of corneal epithelial thickness mapping in epithelial basement membrane dystrophy. PLoS One 2020; 15:e0239124. [PMID: 33237913 PMCID: PMC7688121 DOI: 10.1371/journal.pone.0239124] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 08/31/2020] [Indexed: 12/15/2022] Open
Abstract
Purpose To investigate the corneal epithelial thickness topography with optical coherence tomography (OCT) and its relationship with vision quality in epithelial basement membrane dystrophy (EBMD). Methods 45 eyes of EBMD patients, 26 eyes of dry eye (DED) patients and 22 eyes of normal subjects were enrolled. All participants were subjected to 9-mm corneal epithelial mapping with OCT and vision quality was assessed with the optical quality analysis system using the objective scatter index (OSI). Central, superior, inferior, minimum, maximum, and standard deviation of epithelium thickness (Irregularity), were analysed and correlations with the OSI were calculated. Results The mean (±SD) central, inferior and maximum epithelial thicknesses of the EBMD patients (respectively, 56.4 (±8.1) μm, 58.9 (±6.4) μm, and 67.1 (±8.3) μm) were thicker compared to DED patients (P<0.05) and normal subjects (P<0.05). We found greater irregularity of epithelial thickness in EBMD (5.1±2.5 μm) compared to DED patients (2.6±1.0 μm) (P = 4.4.10−6) and normal subjects (2.1±0.7 μm) (P = 7.6.10−7). The mean OSI was worse in EBMD patients than in DED patients (P = 0.01) and compared to normal subjects (P = 0.02). The OSI correlated with the epithelial thickness irregularity (Spearman coefficient = 0.54; P = 2.65.10−5). Conclusions The OCT pachymetry map demonstrated that EBMD patients had thicker corneal epithelium in the central and inferior region. These changes were correlated with objective measurements of vision quality. This OCT characterisation of the EMBD provides a better understanding of the epithelial behaviour in this dystrophy and its role in vision quality.
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Affiliation(s)
- Juliette Buffault
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Pierre Zéboulon
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Hong Liang
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Anthony Chiche
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Jade Luzu
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Mathieu Robin
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Ghislaine Rabut
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
| | - Marc Labetoulle
- Department of Ophthalmology, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
| | - Antoine Labbé
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
- Department of Ophthalmology, Ambroise Paré Hospital, APHP, Université de Versailles Saint-Quentin en Yvelines, Boulogne-Billancourt, France
| | - Christophe Baudouin
- Department of Ophthalmology III, Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, IHU Foresight, Paris, France
- Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, INSERM-DGOS CIC 1423, IHU Foresight, Paris, France
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
- Department of Ophthalmology, Ambroise Paré Hospital, APHP, Université de Versailles Saint-Quentin en Yvelines, Boulogne-Billancourt, France
- * E-mail:
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Eto T, Teikari P, Najjar RP, Nishimura Y, Motomura Y, Kuze M, Higuchi S. A Purkinje image-based system for an assessment of the density and transmittance spectra of the human crystalline lens in vivo. Sci Rep 2020; 10:16445. [PMID: 33020575 PMCID: PMC7536217 DOI: 10.1038/s41598-020-73541-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/14/2020] [Indexed: 11/09/2022] Open
Abstract
A method for rapid and objective assessment of ocular lens density and transmittance is needed for research and clinical practice. The aim of this study was to determine whether the Purkinje image-based technique can be used for objective and accurate quantification of spectral density and transmittance of ocular media (the mainly crystalline lens) in visible light. Twenty-six individuals (10 young, 9 middle-aged and 7 older individuals) participated in this study. Spectral lens density was evaluated by detecting the intensity of the IVth Purkinje image for different wavelengths. Subsequently, optical density index (ODI), the area under the curve in the lens density spectrum, was calculated and ODIs were compared with clinical lens opacification scales assessed subjectively using a slit lamp. Spectral lens transmittance was estimated from the lens density spectrum. Lens densities were higher in the short wavelength region of the visible spectrum across all age groups. ODI was highly correlated with the clinical opacification scale, while lens transmittance decreased with aging. Our results showed that spectral transmittance of the human crystalline lens can be easily estimated from optical density spectra evaluated objectively and rapidly using the Purkinje image-based technique. Our results provide clinicians and scientists with an accurate, rapid and objective technique for quantification of lens transmittance.
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Affiliation(s)
- Taisuke Eto
- Graduate School of Integrated Frontier Sciences, Kyushu University, Fukuoka, Japan
- Research Fellow of the Japan Society for the Promotion of Science, Fukuoka, Japan
| | - Petteri Teikari
- UCL Queen Square Institute of Neurology, University College London, London, UK
- Department of Visual Neuroscience, Singapore Eye Research Institute, Singapore, Singapore
| | - Raymond P Najjar
- Department of Visual Neuroscience, Singapore Eye Research Institute, Singapore, Singapore
- The Ophthalmology & Visual Sciences ACP (EYE-ACP), SingHealth and Duke-NUS Medical School, Singapore, Singapore
| | - Yuki Nishimura
- Graduate School of Integrated Frontier Sciences, Kyushu University, Fukuoka, Japan
- National Institute of Occupational Safety and Health, Kawasaki, Japan
| | - Yuki Motomura
- Department of Human Science, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka, 815-8540, Japan
| | - Manami Kuze
- Ophthalmology Clinic, Matsusaka Central General Hospital, Matsusaka, Japan
- Department of Ophthalmology, Mie University Graduate School of Medicine, Tsu, Japan
| | - Shigekazu Higuchi
- Department of Human Science, Faculty of Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, Fukuoka, 815-8540, Japan.
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Niu L, Miao H, Tian M, Fu D, Wang X, Zhou X. One-year visual outcomes and optical quality of femtosecond laser small incision lenticule extraction and Visian Implantable Collamer Lens (ICL V4c) implantation for high myopia. Acta Ophthalmol 2020; 98:e662-e667. [PMID: 32003129 DOI: 10.1111/aos.14344] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/20/2019] [Indexed: 11/30/2022]
Abstract
PURPOSE To compare one-year visual outcomes and optical quality after femtosecond laser small incision lenticule extraction (SMILE) and Visian Implantable Collamer Lens with a central hole (ICL V4c) implantation for high myopia. METHODS This prospective non-randomized study included 37 eyes of 20 patients who underwent SMILE (G-S) and 39 eyes of 20 patients who underwent ICL V4c implantation (G-V). Spherical equivalent (SE), uncorrected distance visual acuity, corrected distance visual acuity, retinal image quality and intraocular scattering were evaluated at one year after surgery. Each model was adjusted for age, gender, eye and preoperative SE during treatment. RESULTS At the one-year follow-up, G-S and G-V showed similar safety index (1.13 ± 0.13 and 1.11 ± 0.15, respectively) and efficacy index (1.05 ± 0.14 and 1.06 ± 0.15, respectively). All 21 eyes with Toric ICL (TICL) had a postoperative astigmatism of ≤0.5 dioptres (D), while the astigmatism was ≤0.5 D in all G-S eyes. Thirty-six G-S eyes (97%) and 35 G-V eyes (90%) were within ± 0.5 D of the target SE. The changes in the modulation transfer function cut-off frequency (MTFcut-off ) and the objective scatter index from before operation to one year following the operation were not significantly different between the groups (p = 0.523 and 0.826, respectively). CONCLUSION Both SMILE and ICL V4c implantation provide good safety, efficacy, predictability, and stability in correcting high myopia. Optical quality including intraocular scattering was great and relatively stable in both groups during the one-year observation period.
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Affiliation(s)
- Lingling Niu
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
| | - Huamao Miao
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
| | - Mi Tian
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
| | - Dan Fu
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
| | - Xiaoying Wang
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
| | - Xingtao Zhou
- Department of Ophthalmology and Optometry, Eye and ENT Hospital Fudan University Shanghai China
- NHC Key Laboratory of Myopia Fudan University Shanghai China
- Shanghai Research Center of Ophthalmology and Optometry Shanghai China
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Zafar AB, Chu RC, Bishara MN, Qazi MA, Mahmoud AM, Pepose JS. <p>Objective Quantification of Image Quality and Optical Scatter Before and After Nd:YAG Capsulotomy Using a Double-Pass Technique</p>. Clin Ophthalmol 2020; 14:1403-1411. [PMID: 32546948 PMCID: PMC7266399 DOI: 10.2147/opth.s248286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose The purpose of this study is to evaluate and compare the correlation between changes in vision and HD Analyzer dual-pass metrics versus changes in vision and conventional subjective slit lamp gradings in pseudophakic patients with posterior capsular opacity undergoing neodymium:yttrium-aluminum-garnet (Nd:YAG) capsulotomy. Patients and Methods High contrast (HC) and low contrast (LC) best spectacle-corrected distance visual acuity (BCVA) and HD Analyzer evaluation were prospectively performed on patients with mild-to-moderate posterior capsular opacification (PCO) and monofocal and accommodating intraocular lens implants. Differences between pre- and post-operative measurements were calculated, along with the correlation of HD Analyzer metrics and slit lamp grading to changes in visual acuity. Results Following Nd:YAG capsulotomy (n=29), there was statistically significant improvement in HC-BCVA and LC-BCVA, decrease in optical scatter, and corresponding improvement in Strehl ratio and HD Analyzer values at all contrast levels tested (p≤0.05). Pearson test showed a high correlation between the improvement in HC-BCVA (r coefficient = 0.78) and LC-BCVA (r coefficient = 0.71) to the improvement in Objective Scatter Index (OSI). There was a higher correlation of change in HC-BCVA to pre-op OSI (r2=0.61) than to the subjective PCO grading score (r2 = 0.19). There was also a higher correlation of change in LC-BCVA to pre-op OSI (r2 = 0.49) than to subjective grading (r2 = 0.16). Conclusion The HD Analyzer provides objective measurements of forward light scatter (ie, light directed towards the retina) that can assist with both PCO grading and prediction of improvement of visual quality after YAG laser capsulotomy with higher accuracy than conventional slit lamp assessment based upon backscatter (ie, light traveling to the observer) in patients tested with monofocal and accommodating intraocular lens implants.
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Affiliation(s)
- Abu-Bakar Zafar
- Department of Ophthalmology, Carle Foundation Hospital, Champaign, IL, USA
| | | | | | - Mujtaba A Qazi
- Pepose Vision Institute, St. Louis, MO, USA
- Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, MO, USA
| | - Ashraf M Mahmoud
- Department of Ophthalmology, Ohio State University, Columbus, OH, USA
| | - Jay S Pepose
- Pepose Vision Institute, St. Louis, MO, USA
- Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, MO, USA
- Correspondence: Jay S Pepose Pepose Vision Institute, 1815 Clarkson Road, Chesterfield, MO63107, USA Email
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Qin Q, Wu Z, Bao L, Chen H, Yang L, He Z, Huang Z. Evaluation of visual quality after EVO-ICL implantation for hypermyopia: An observational study. Medicine (Baltimore) 2019; 98:e17677. [PMID: 31689784 PMCID: PMC6946539 DOI: 10.1097/md.0000000000017677] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The purpose of this retrospective study was to evaluate the visual quality, objective scattering index, aberration, etc after Implantable Collamer Lens with center hole (EVO-ICL) implantation to treat patients with hypermyopia (diopter > -10 D).A total of 30 eyes underwent EVO-ICL implantation. The uncorrected distance visual acuity (UDVA), best-corrected visual acuity (BCVA), equivalent spherical degree, aberration, visual quality parameters, and corneal endothelial cell density were compared preoperative and postoperative. Fill in the National Eye Institute Refractive Error Quality of Life Instrument-42 before and after surgery.The modulation transfer function (MTF), Optical Quality Analysis System (OQAS) II values (OV 100%, 20%, 9%), and Stahl ratio 1 and 3 months after surgery were higher than the respective preoperative values. The objective scatter index value increased 1 week after surgery, but decreased 1 and 3 months after surgery compared with the preoperative values. Total aberration (TA), total low-order aberration (tLOAs), and defocus decreased at 1 week and 3 months after EVO-ICL implantation. Total high-order aberration (tHOAs) and spherical aberration were significantly increased 1 week after surgery and decreased 3 months after surgery, and the difference was statistically significant. Astigmatism, coma, and clover were not significantly different in each time period. TA, tLOAs, tHOAs, defocus, and spherical aberration were higher at 1 week than 3 months after surgery. At 3 months after surgery, the scores of the patients' NEI-RQL-42 scale were all improved except that the glare was lower than that before surgery. There was no significant difference in the density of corneal endothelial cells before and 3 months after surgery.For patients with hypermyopia, the postoperative subjective and objective visual quality of EVO-ICL implantation was better than preoperative.
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Affiliation(s)
- Qin Qin
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School
- Department of Ophthalmology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University
- Department of Ophthalmology, Jinling Medical School of Nanjing Medical University
- Department of Ophthalmology, Jinling Hospital
| | - Zhengcan Wu
- Department of Radiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Lianyun Bao
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School
| | - Hui Chen
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School
| | - Liping Yang
- Department of Ophthalmology, Jinling Medical School of Nanjing Medical University
- Department of Ophthalmology, Jinling Hospital
| | - Zifang He
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School
| | - Zhenping Huang
- Department of Ophthalmology, Jinling Medical School of Nanjing Medical University
- Department of Ophthalmology, Jinling Hospital
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Effects of Blink Rate on Tear Film Optical Quality Dynamics with Different Soft Contact Lenses. J Ophthalmol 2019; 2019:4921538. [PMID: 31360543 PMCID: PMC6652047 DOI: 10.1155/2019/4921538] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/27/2019] [Accepted: 06/10/2019] [Indexed: 12/12/2022] Open
Abstract
Objective The aim of this study was to investigate tear film optical quality dynamics for four types of silicone hydrogel contact lenses (SHCLs) for daily wear over a 15-day period and for different blink rate (BR) patterns. Methods A prospective randomized, double-blind, cross-over pilot study including four SHCLs (A: lotrafilcon B (Air Optix plus HydraGlyde, Alcon Laboratories); B: samfilcon A (Ultra, Bausch & Lomb); C: comfilcon A (Biofinity, CooperVision); and D: filcom V3 (Blu:gen, Mark'Ennovy)). Serial measurements of Objective Scatter Index (OSI) using the HD Analyzer (Visiometrics S.L., Terrassa, Spain) were taken at different blinking patterns: blinking every 2.5 seconds (high BRs) and every 9 seconds (low BRs). They were performed during the first visit before CL insertion (baseline), after 20 minutes of CL wear (Day 1), and during the last visit after 8 hours of CL wear on day 15 of use (Day 15). Results Normal young healthy subjects were recruited and fitted with the four lenses. For low BRs, the mean OSI value increased over time for all CLs and the slope of the curve also increased for all CLs, except for CL D. However, for high BRs, the mean OSI value increased only for CLs B and C and the slope of the curve did not change over time for any of them. Conclusions These results suggest that the tear film optical quality dynamics after wearing SCHLs for 15 days seems to undergo a slight deterioration only for lowest BR.
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Ganesh S, Brar S, Arra RR. Gas Bubble Escape Sign: A New Intraoperative Sign to Predict Immediate Visual Quality After Small Incision Lenticule Extraction. J Refract Surg 2019; 35:467-472. [DOI: 10.3928/1081597x-20190606-01] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 06/03/2019] [Indexed: 11/20/2022]
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García-Guerra CE, Martínez-Roda JA, Aldaba M, Díaz-Doutón F, Vilaseca M, Vohnsen B, Pujol J. Method to reduce undesired multiple fundus scattering effects in double-pass systems. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2019; 36:918-924. [PMID: 31045021 DOI: 10.1364/josaa.36.000918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 03/26/2019] [Indexed: 06/09/2023]
Abstract
Double-pass systems rely on backscattering of light by the human ocular fundus to assess the optical quality of the eye. In this work, we present a method to reduce double-pass image degradation caused by undesired multiple scattering effects in the eye fundus. The reduction is based on combined data processing of simultaneous measurements using two different configurations: one symmetric with equal entrance and exit pupils and another asymmetric with unequal entrance and exit pupils. Under certain conditions, such scattering effects may be effectively suppressed. Measurements of human eyes show that, although multiple fundus scattering imposes a shift on the estimations, double-pass systems can be used to predict the optical quality of the eye within a population.
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Qin Q, Bao L, Yang L, He Z, Huang Z. Comparison of visual quality after EVO-ICL implantation and SMILE to select the appropriate surgical method for high myopia. BMC Ophthalmol 2019; 19:21. [PMID: 30732575 PMCID: PMC6367781 DOI: 10.1186/s12886-019-1029-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 01/04/2019] [Indexed: 11/11/2022] Open
Abstract
Background This study sought to compare the visual quality between intraocular collamer lens (EVO-ICL) implantation and small-incision lenticule extraction (SMILE) and determine the appropriate surgical method to treat patients with high myopia (− 6.25 to − 10 D). Methods A total of 48 eyes underwent EVO-ICL implantation and another 48 eyes underwent SMILE. The uncorrected distance visual acuity (UDVA), best-corrected distance visual acuity (BCVA) and equivalent spherical degree were compared across the SMILE (− 6.25 to − 10 D) and EVO-ICL (− 6.25 to − 10 D) implantation groups. Preoperative and postoperative visual quality parameters were compared between and within groups. Results The OQAS II values (OV 100%) one week and one month after surgery and the modulation transfer function (MTF), OV 20% and OV 9% values one week after surgery in the SMILE group were lower than the respective preoperative values. The objective scatter index (OSI) value increased one week as well as one month after surgery compared with the preoperative values. The MTF cut-off value of the SMILE group was lower than that of the EVO-ICL implantation group three months after surgery. Conclusions For patients with high myopia, the postoperative visual quality of EVO- ICL implantation was slightly better than that of SMILE.
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Affiliation(s)
- Qin Qin
- Department of Ophthalmology, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, 210008, Jiangsu, China.,Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School, Nanjing, 210008, China.,Department of Ophthalmology, Jinling Medical School of Nanjing Medical University, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China.,Department of Ophthalmology, Jinling Hospital, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China
| | - Lianyun Bao
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School, Nanjing, 210008, China
| | - Liping Yang
- Department of Ophthalmology, Jinling Medical School of Nanjing Medical University, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China.,Department of Ophthalmology, Jinling Hospital, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China
| | - Zifang He
- Department of Ophthalmology, Nanjing Drum Tower Hospital, Affiliated to Nanjing University Medical School, Nanjing, 210008, China
| | - Zhenping Huang
- Department of Ophthalmology, Jinling Medical School of Nanjing Medical University, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China. .,Department of Ophthalmology, Jinling Hospital, No. 305 East Zhongshan Road, Nanjing, 210002, Jiangsu Province, China.
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Li Q, Wang H, Gao P. Assessment of Visual Function in Patients with Myopic Foveoschisis. Curr Eye Res 2018; 44:76-81. [PMID: 30183416 DOI: 10.1080/02713683.2018.1516782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Purpose: To assess the visual function in patient with myopic foveoschisis (MF). Methods: Fifty-one eyes of 51 subjects were enrolled and divided into myopic foveoschisis group (MFG, N = 16), myopic control group (MCG, N = 18), and normal control group (NCG, N = 17) according to their diagnoses. Measurements of the logarithm of the minimum angle of resolution (LogMAR), the objective scatter index (OSI), the cut-off value of modulation transfer function (COMTF), the Strehl ratio (SR), the foveal threshold (FT), and the amplitude density (AD) in the first central ring of multifocal electroretinography were recorded and compared amongst groups. Results: LogMAR of MFG was the highest (MFG vs. MCG p<0.001, MFG vs. NCG p<0.001), and LogMAR of MCG and NCG were similar (p = 0.258). OSI of MFG was higher than that of MCG (p<0.001), and the latter was higher than OSI of NCG (p<0.001). COMTF was lowest in MFG, intermediate in MCG and highest in NCG (MFG vs. MCG p = 0.001, MFG vs. NCG p<0.001, MCG vs. NCG p<0.001). SR, FT, and AD were all similar between MFG and MCG (p = 0.187, p = 0.401, and p = 0.446, respectively) while highest in NCG (SR MFG vs. NCG p<0.001, MCG vs. NCG p<0.001; FT MFG vs. NCG p = 0.003, MCG vs. NCG p = 0.025; AD MFG vs. NCG p<0.001, MCG vs. NCG p<0.001). Conclusions: Similarities were found between various functional parameters from different devices, revealing that the visual function in MF patients was impaired.
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Affiliation(s)
- Qingchen Li
- a Department of Ophthalmology and Vision Science, Eye and ENT Hospital , Fudan University , Shanghai , People's Republic of China
| | - Hao Wang
- b Department of Ophthalmology , Shanghai Tenth People's Hospital, Tongji University , Shanghai , People's Republic of China
| | - Peng Gao
- b Department of Ophthalmology , Shanghai Tenth People's Hospital, Tongji University , Shanghai , People's Republic of China
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Ortiz C, Ortiz-Peregrina S, Castro JJ, Casares-López M, Salas C. Driver distraction by smartphone use (WhatsApp) in different age groups. ACCIDENT; ANALYSIS AND PREVENTION 2018; 117:239-249. [PMID: 29723735 DOI: 10.1016/j.aap.2018.04.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 05/24/2023]
Abstract
This paper investigates the effect that texting with WhatsApp, one of the most common applications for instant messaging, exerts on driving performance. Because distracted driving also affects older drivers, who can have seriously compromised vision, we also analysed the associations between visual-function parameters and driving performance. A total of 75 drivers, experienced in sending WhatsApp messages (≥10WhatsApp messages/week), participated in this study and were divided into four age categories. Visual-function tests included contrast sensitivity with and without glare, retinal straylight and objective assessment of optical quality. Simulated driving performance was assessed under a baseline driving condition (without distraction) as well as a texting condition (WhatsApp messages) while driving. The participants used their own mobile phone. Lastly, objective results of driving performance were compared with subjective self-report data from the Driver Behaviour Questionnaire (DBQ). The analysis indicated that functional changes occurring with age, such as a lower contrast sensitivity and greater retinal straylight, were correlated with a higher number of collisions, longer distances driven outside the lane, and greater standard deviation of lateral position (SDLP). The results showed a significant main effect of age for the driving-performance parameters. Also, compared to the baseline, texting WhatsApp messages while driving worsens driving performance for all age groups, most notably among older participants. Thus, the older drivers' SDLP was ∼14% higher than that for the baseline average of all the other drivers and rose to 29% under distraction, reflecting the impact of secondary tasks. The negative effect of the use of the smartphone during driving was also reflected in the number of collisions, with a greater risk of accidents in all the groups of drivers (by 8.3% for young adults, 25.0% for adults, 80.5% for middle-aged adults, and 134.5% for older drivers). Lastly, participants' subjective responses indicated that younger drivers (18-24 years) had a higher risk of deliberately violating safe driving practices (p < 0.05). The present study demonstrates that texting WhatsApp messages while driving significantly impairs the ability to drive safely, with older drivers being the group most adversely affected. It would be recommendable to include other nonstandard vision tests, which have shown associations with driving performance, in the examination for driver licensing. This would help raise the awareness of older drivers concerning their visual limitations, permitting them to adopt compensatory measures to improve their driving safety. Nevertheless, it is also necessary to raise awareness among the younger drivers of the risks involved in behaviour behind the wheel.
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Affiliation(s)
- C Ortiz
- Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Granada, 18071, Spain.
| | - S Ortiz-Peregrina
- Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Granada, 18071, Spain
| | - J J Castro
- Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Granada, 18071, Spain
| | - M Casares-López
- Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Granada, 18071, Spain
| | - C Salas
- Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Granada, 18071, Spain
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Miao H, Liu X, Tian M, Zhao J, Fang X, Zhou X. Short-term Observation of Intraocular Scattering and Bowman's Layer Microdistortions After SMILE-CCL. J Refract Surg 2018; 34:387-392. [PMID: 29889291 DOI: 10.3928/1081597x-20180426-02] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 04/20/2018] [Indexed: 01/24/2023]
Abstract
PURPOSE To investigate changes in intraocular scattering and Bowman's layer microdistortions after femtosecond laser small incision lenticule extraction using the continuous curvilinear lenticulerhexis technique (SMILE-CCL). METHODS In this prospective study, 93 eyes of 93 patients (44 women, 49 men) were treated with SMILE-CCL. Mean age was 26.09 ± 4.39 years and mean spherical equivalent was -6.31 ± 2.16 diopters. The Objective Scatter Index (OSI) was examined with an objective optical quality analysis system. Bowman's layer microdistortions in the central 4-mm optical zone were measured using Fourier-domain optical coherence tomography. RESULTS The mean OSI value increased from 0.67 preoperatively to 1.09 at 20 days, and then decreased to 0.84 at 3 months (P < .05). Microdistortions were observed in 62.37% of the eyes at 20 days and 48.39% at 3 months postoperatively (P < .05). The width of the microdistortions per meridian was 283.18 ± 197.19 μm at 20 days; this decreased to 156.00 ± 159.86 μm at 3 months (P < 0.05). Regression analysis models revealed that older age (b = 0.02, P = .03) and higher preoperative spherical equivalent (b = -0.09, P < .05) resulted in higher postoperative OSI values; no significant association was found between postoperative OSI values and microdistortion-related parameters (P > .05). Higher preoperative spherical equivalent (b = -0.28, P = .01) and thinner preoperative corneal thickness (b = -0.02, P = .01) were associated with more microdistortions. CONCLUSIONS SMILE induced a temporary increase in OSI values and Bowman's layer microdistortions. The microdistortions did not influence intraocular scattering. [J Refract Surg. 2018;34(6):387-392.].
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Martínez-Roda JA, Vilaseca M, Ondategui JC, Aguirre M, Pujol J. Effects of aging on optical quality and visual function. Clin Exp Optom 2016; 99:518-525. [PMID: 27452417 DOI: 10.1111/cxo.12369] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 07/31/2015] [Accepted: 08/04/2015] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND We assessed the effects of aging on visual function and optical quality in a healthy adult population and provide reference values for different age ranges. METHODS We conducted a prospective study with 198 healthy volunteers from 31 to 70 years of age. The visual acuity (VA) and contrast sensitivity (CS) at 3, 6, 12 and 18 cycles per degree (cpd) frequencies were assessed, together with values of optical quality and intraocular scattering obtained with a double-pass system (Optical Quality Analysis System - OQAS), specifically the modulation transfer function cutoff frequency (MTFcutoff ), the Strehl ratio, the OQAS values (OV) at contrasts of 100, 20 and nine per cent and the objective scatter index (OSI). We studied the change of these variables with age and obtained standard values for optical quality and intraocular scattering parameters for four age groups: 31 to 40, 41 to 50, 51 to 60 and 61 to 70 years. RESULTS We found significant correlations between age and all variables analysed and significant differences among the age groups considered except for CS (3 cpd) (p = 0.067). Ageing particularly affected low-contrast parameters, such as the OV nine per cent and the OSI, which decreased to 37 and 50 per cent of their original values, respectively. The OSI was found to provide high sensitivity and specificity values, when healthy and caratactous eyes were considered. The results suggest that optical deficits are compensated until 50 years of age with sensory and perceptual factors, as smaller changes were found for visual function than for objective measurements of optical quality and intraocular scattering. CONCLUSIONS Measures of optical quality assessed by subjective psychophysical and objective techniques varied differently with age. Values obtained for each age group can be used to determine normal limits of optical quality and intraocular scattering for diagnosis of ocular conditions.
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Affiliation(s)
- Joan A Martínez-Roda
- Centre for Sensors, Instruments and Systems Development (CD6), Technical University of Catalonia, Terrassa, Barcelona, Spain.
| | - Meritxell Vilaseca
- Centre for Sensors, Instruments and Systems Development (CD6), Technical University of Catalonia, Terrassa, Barcelona, Spain
| | - Juan C Ondategui
- Centre for Sensors, Instruments and Systems Development (CD6), Technical University of Catalonia, Terrassa, Barcelona, Spain
| | - Montserrat Aguirre
- University Vision Centre, Technical University of Catalonia, Terrassa, Barcelona, Spain
| | - Jaume Pujol
- Centre for Sensors, Instruments and Systems Development (CD6), Technical University of Catalonia, Terrassa, Barcelona, Spain
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22
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Chen T, Yu F, Lin H, Zhao Y, Chang P, Lin L, Chen Q, Zheng Q, Zhao YE, Lu F, Li J. Objective and subjective visual quality after implantation of all optic zone diffractive multifocal intraocular lenses: a prospective, case-control observational study. Br J Ophthalmol 2016; 100:1530-1535. [PMID: 26903522 DOI: 10.1136/bjophthalmol-2015-307135] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/28/2015] [Accepted: 01/22/2016] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND AIMS To evaluate the objective and subjective optical quality of all optic zone diffractive multifocal intraocular lens (IOL). METHODS Fifty patients (50 eyes) having phacoemulsification and IOL implantation surgery were enrolled. 25 patients were implanted with all optic zone diffractive multifocal IOL and 25 patients with monofocal IOL. Objective optical quality parameters under 4 mm pupil using Optical Quality Analysis System (OQAS), subjective visual acuity (VA) at 85 cd/m2 luminance and questionnaire concerning halo and visual function were assessed. RESULTS The multifocal group gained similar objective optical outcomes, such as OQAS values at contrast 100%, 20%, 9%, modulation transfer function cut-off and Strehl ratio, as the monofocal group. Objective scatter index (OSI) was significantly better in the monofocal group. Distance corrected near VA, uncorrected near VA, distance corrected intermediate VA and uncorrected intermediate VA were significantly better in the multifocal group. The difference in uncorrected distance VA and best corrected distance VA between the monofocal and multifocal groups was not significant. Mild halos and glare were reported in both groups and a significant difference between the two groups was not observed; however, moderate glare and halos were reported only in the multifocal group (2/25). There was no significant difference between the two groups when visual function was compared. CONCLUSIONS All optic zone diffractive multifocal IOLs provided almost the same objective optical quality as monofocal IOLs did under 4 mm pupil besides good all distance visual performance, but with greater OSI, indicating that implantation provides good optical quality in daytime but with more intraocular scatter light. TRIAL REGISTRATION NUMBER NCT02234635, post-results.
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Affiliation(s)
- Tianyu Chen
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Fang Yu
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huayou Lin
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yinying Zhao
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Pingjun Chang
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Lei Lin
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qi Chen
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Qian Zheng
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yun-E Zhao
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Fan Lu
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jin Li
- Department of Cataract, Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
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Intraocular Scattering after Instillation of Diquafosol Ophthalmic Solution. Optom Vis Sci 2015; 92:e303-9. [PMID: 25551688 DOI: 10.1097/opx.0000000000000490] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
PURPOSE To assess the changes in intraocular scattering before and after instillation of diquafosol ophthalmic solution in patients with short tear breakup time (TBUT) dry eye. METHODS We prospectively examined 20 eyes of 20 short TBUT dry eye patients (study group) and age-matched 20 eyes of 20 healthy subjects (control group). Intraocular scattering was measured as the objective scattering index (OSI) at 0.5-second intervals over 10 seconds without blinking. Patients were instructed to start topical administration of 3% diquafosol ophthalmic solution six times daily for 4 weeks. RESULTS The OSI significantly deteriorated after 7.0 seconds compared with the initial value of OSI after the blinking in the study group. The OSI was also significantly higher in the study group than in the control group at 4.5 to 10.0 seconds after the blinking (p < 0.05). We found significant improvements 2 weeks after treatment not only in TBUT (p < 0.001) but also in the mean OSI, the OSI change rate, and the slope of the linear regression line of the OSI within 10 seconds (p < 0.001, p = 0.003, and p = 0.002, respectively). We also found significant improvements 4 weeks after treatment in these variables. CONCLUSIONS Intraocular scattering deteriorates significantly with time in patients with short TBUT dry eye. Diquafosol ophthalmic solution exhibits an improvement not only in TBUT but also in intraocular scattering, indicating that diquafosol is also effective for improving the optical quality of the eye.
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Tian M, Miao H, Shen Y, Gao J, Mo X, Zhou X. Intra- and Intersession Repeatability of an Optical Quality and Intraocular Scattering Measurement System in Children. PLoS One 2015; 10:e0142189. [PMID: 26536120 PMCID: PMC4633240 DOI: 10.1371/journal.pone.0142189] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Accepted: 10/19/2015] [Indexed: 11/18/2022] Open
Abstract
Purpose To evaluate intra- and intersession repeatability of objective optical quality and intraocular scattering measurements with a double-pass system in children. Methods Forty-two eyes of 42 children were included in the study. An optical quality analysis system (OQAS) was used to measure optical quality parameters, including modulation transfer function cutoff frequency (MTFcutoff), Strehl ratio (SR), OQAS values (OV) at 3 different contrasts and objective scatter index (OSI). Three measurement sessions with 10-min intervals were operated by the same technician, and in each session four consecutive measurements were obtained. Results Mean values for MTFcutoff, SR and OSI were 46.85 ± 7.45cpd, 0.27 ± 0.06 and 0.34 ± 0.22 respectively. 1) The intraclass correlation coefficients were ranged from 0.89 to 0.97 and coefficients of variation from 0.06 to 0.16 for all the parameters in the first session; the relative repeatability were 11.1% (MTFcutoff), 22.5% (SR), 10.9% (OV100%), 16.6% (OV2%), 22.4% (OV9%) and 56.3% (OSI). Similar results were found in the second and third sessions. 2) Bland-Altman analysis showed that narrow 95% confidence intervals (compared between the first and second sessions) ranged from -5.42 to 5.28 (MTFcutoff), -0.05 to 0.07 (SR), -0.18 to 0.18 (OV100%), -0.26 to 0.29 (OV20%), -0.33 to 0.39 (OV9%) and -0.11 to 0.09 (OSI); the comparison between any two of the three sessions showed similar results. Conclusion Measurements of optical quality and intraocular scattering in children by the double-pass system showed good intra- and intersession repeatability. Retinal image quality is high and intraocular scattering is low in children.
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Affiliation(s)
- Mi Tian
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Myopia Key Laboratory of the Health Ministry, Shanghai, People's Republic of China
| | - Huamao Miao
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Myopia Key Laboratory of the Health Ministry, Shanghai, People's Republic of China
| | - Yang Shen
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Myopia Key Laboratory of the Health Ministry, Shanghai, People's Republic of China
| | - Jian Gao
- Center of Clinical Epidemiology and Evidence-based Medicine, Fudan University, Shanghai, People's Republic of China
| | - Xiaofen Mo
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Myopia Key Laboratory of the Health Ministry, Shanghai, People's Republic of China
- * E-mail: (XZ); (XM)
| | - Xingtao Zhou
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Myopia Key Laboratory of the Health Ministry, Shanghai, People's Republic of China
- * E-mail: (XZ); (XM)
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Hu AL, Qiao LY, Zhang Y, Cai XG, Li L, Wan XH. Reproducibility of optical quality parameters measured at objective and subjective best focuses in a double-pass system. Int J Ophthalmol 2015; 8:1043-50. [PMID: 26558224 DOI: 10.3980/j.issn.2222-3959.2015.05.34] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 09/07/2015] [Indexed: 11/02/2022] Open
Abstract
AIM To evaluate intra-session repeatability and reproducibility of optical quality parameters measured at objective and subjective best focuses in a double-pass system. METHODS Thirty Chinese healthy adults (19 to 40 years old) meeting our inclusion criterion were enrolled in the study. After a basic eye examination, two methods of optical quality measurement, based on subjective and objective best focuses were performed using the Optical Quality Analysis System (OQAS) with an artificial pupil diameter of 4.0 mm. RESULTS With each method, three consecutive measurements of the following parameters: the modulation transfer function cutoff frequency (MTFcutoff), the Strehl(2D) ratio, the OQAS values (OVs) at contrasts of 100%, 20%, 9% and the objective scatter index (OSI) were performed by an experienced examiner. The repeatability of each method was evaluated by the repeatability limit (RL) and the coefficient of repeatability (COR). Reproducibility of the two methods was evaluated by intra-class correlation coefficient (ICC) and the 95% limits of agreement (Bland and Altman analysis). Thirty subjects, seven females and twenty three males, of whom 15 right eyes and 15 left eyes were selected randomly for recruitment in the study. The RLs (percentage) for the six parameters measured at objective focus and subjective focus ranged from 8.44% to 15.13% and 10.85% to 16.26%, respectively. The CORs for the two measurement methods ranged from 8.27% to 14.83% and 10.63% to 15.93%, respectively. With regard to reproducibility, the ICCs for the six parameters of OQAS ranged from 0.024 to 0.276. The 95% limits of agreement obtained for the six parameters (in comparison of the two methods) ranged from -0.57 to 42.18 (MTFcutoff), -0.01 to 0.23 (Strehl(2D) ratio), -0.02 to 1.40 (OV100%), -0.10 to 1.75 (OV20%), -0.14 to 1.80 (OV9%) and -1.46 to 0.18 (OSI). CONCLUSION Measurements provided by OQAS with either method showed a good repeatability. However, the results obtained from the two different measurement methods showed a poor reproducibility. These findings suggest that it might be best to evaluate patients' optical quality by OQAS using the best focus as chosen automatically by the instrument.
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Affiliation(s)
- Ai-Lian Hu
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
| | - Li-Ya Qiao
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
| | - Ye Zhang
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
| | - Xiao-Gu Cai
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
| | - Lei Li
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
| | - Xiu-Hua Wan
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Vision Science Key Lab, Beijing 100730, China
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Effect of Rebamipide Ophthalmic Suspension on Intraocular Light Scattering for Dry Eye After Corneal Refractive Surgery. Cornea 2015; 34:895-900. [DOI: 10.1097/ico.0000000000000456] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Repeatability, Reproducibility, and Comparability of Subjective and Objective Measurements of Intraocular Forward Scattering in Healthy Subjects. BIOMED RESEARCH INTERNATIONAL 2015; 2015:925217. [PMID: 26176015 PMCID: PMC4484563 DOI: 10.1155/2015/925217] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 05/10/2015] [Accepted: 06/07/2015] [Indexed: 11/24/2022]
Abstract
Purpose. To assess the repeatability, reproducibility, and comparability of measurements of subjective and objective forward scattering in healthy subjects. Methods. We prospectively examined twenty eyes of 20 healthy volunteers (7 men and 13 women; ages, 28.4 ± 4.1 years). The logarithmic straylight value (log(s)) and the objective scattering index (OSI) were measured with a straylight meter (C-Quant) and a point-spread function meter (OQAS), respectively. Results. The 95% limits of agreement (LoA) between first and second measurements ranged from −0.211 to 0.207 for the C-Quant and from −0.302 to 0.477 for the OQAS. The intraclass correlation coefficients for the repeatability of the log(s) and OSI measurements were 0.815 and 0.926, respectively. The mean difference between examiners was −0.051 ± 0.133 (95% LoA; −0.311 to 0.209) for the C-Quant and 0.080 ± 0.307 (−0.522 to 0.682) for the OQAS. There was a modest, but significant, correlation between the log(s) and the OSI (Spearman correlation coefficient r = 0.498, p = 0.026). Conclusions. The C-Quant and the OQAS provide good repeatability and reproducibility, although the OQAS measurement provides a slightly higher ICC than the C-Quant measurement. The subjective forward scattering may be to some extent expressed in the objective forward scattering in healthy subjects.
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Kamiya K, Shimizu K, Igarashi A, Kobashi H. Effect of femtosecond laser setting on visual performance after small-incision lenticule extraction for myopia. Br J Ophthalmol 2015; 99:1381-7. [PMID: 25855501 DOI: 10.1136/bjophthalmol-2015-306717] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/22/2015] [Indexed: 11/04/2022]
Abstract
AIM To compare the effect of the two femtosecond laser settings on visual performance after small-incision lenticule extraction (SMILE) for myopia and myopic astigmatism. METHODS Forty-four eyes of 22 consecutive patients who underwent SMILE with an energy level of 140 nJ (spot distance 3.0 µm) in one eye, and with an energy level of 170 nJ (spot distance 4.5 µm) in the other eye, the eyes being randomly assigned. Preoperatively, 1 week, and 1 and 3 months postoperatively, the values of the modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scattering index (OSI) and Optical Quality Analysis System (OQAS) values (OVs) for these eyes were quantitatively assessed using an Optical Quality Analysis System (Visiometrics). RESULTS No significant differences were detected between the two groups in the visual and refractive outcomes, or in the MTF cutoff frequency, the Strehl ratio, the OSI, the OV 100%, the OV 20% or the OV 9% at any time point before or after surgery. CONCLUSIONS SMILE with energy settings of 140 and 170 nJ was effective for the correction of myopia and myopic astigmatism. It is indicated that the differences in laser setting (140 nJ, spot distance 3.0 µm vs 170 nJ, spot distance 4.5 µm) did not significantly affect the optical quality including the intraocular scattering of eyes undergoing SMILE. CLINICAL TRIAL NUMBER The protocol was registered with University Hospital Medical Information Network Clinical Trial Registry (UMIN000016241).
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Affiliation(s)
- Kazutaka Kamiya
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
| | - Kimiya Shimizu
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
| | - Akihito Igarashi
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
| | - Hidenaga Kobashi
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
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Xiao XW, Hao J, Zhang H, Tian F. Optical quality of toric intraocular lens implantation in cataract surgery. Int J Ophthalmol 2015; 8:66-71. [PMID: 25709910 DOI: 10.3980/j.issn.2222-3959.2015.01.12] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 02/24/2014] [Indexed: 11/02/2022] Open
Abstract
AIM To analyze the optical quality after implantation of toric intraocular lens with optical quality analysis system. METHODS Fifty-two eyes of forty-four patients with regular corneal astigmatism of at least 1.00 D underwent implantation of AcrySof toric intraocular lens, including T3 group 19 eyes, T4 group 18 eyes, T5 group 10 eyes, T6 group 5 eyes. Main outcomes evaluated at 3mo of follow-up, included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), residual refractive cylinder and intraocular lens (IOL) axis rotation. Objective optical quality were measured using optical quality analysis system (OQAS II(®), Visiometrics, Spain), included the cutoff frequency of modulation transfer function (MTFcutoff), objective scattering index (OSI), Strehl ratio, optical quality analysis system value (OV) 100%, OV 20% and OV 9% [the optical quality analysis system (OQAS) values at contrasts of 100%, 20%, and 9%]. RESULTS At 3mo postoperative, the mean UDVA and CDVA was 0.18±0.11 and 0.07±0.08 logMAR; the mean residual refractive cylinder was 0.50±0.29 D; the mean toric IOL axis rotation was 3.62±1.76 degrees, the mean MTFcutoff, OSI, Strehl ratio, OV 100%, OV 20% and OV 9% were 22.862±5.584, 1.80±0.84, 0.155±0.038, 0.76±0.18, 0.77±0.19 and 0.78±0.21. The values of UDVA, CDVA, IOL axis rotation, MTFcutoff, OSI, Strehl ratio, OV100%, OV20% and OV9% depending on the power of the cylinder of the implantation were not significantly different (P>0.05), except the residual refractive cylinder (P<0.05). CONCLUSION The optical quality analysis system was useful for characterizing the optical quality of AcrySof toric IOL implantation. Implantation of an AcrySof toric IOL is an effective and safe method to correct corneal astigmatism during cataract surgery.
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Affiliation(s)
- Xian-Wen Xiao
- Tianjin Medical University Eye Hospital, Tianjin 300384, China ; Xiamen Eye Center of Xiamen University, Xiamen 361000, Fujian Province, China
| | - Jing Hao
- Tianjin Medical University Eye Hospital, Tianjin 300384, China
| | - Hong Zhang
- Tianjin Medical University Eye Hospital, Tianjin 300384, China
| | - Fang Tian
- Tianjin Medical University Eye Hospital, Tianjin 300384, China
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Xu CC, Xue T, Wang QM, Zhou YN, Huang JH, Yu AY. Repeatability and reproducibility of a double-pass optical quality analysis device. PLoS One 2015; 10:e0117587. [PMID: 25646846 PMCID: PMC4315520 DOI: 10.1371/journal.pone.0117587] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Accepted: 12/28/2014] [Indexed: 11/18/2022] Open
Abstract
Purpose To evaluate the repeatability and reproducibility of a double-pass instrument (OQASII, Visiomereics SL, Spain), which objectively measures overall optical quality of the human eyes. Methods The right eye of 119 healthy subjects with best corrected visual acuity of 20/25 or better was included in this prospective, comparative, observational study. Two separate tests with OQASII were conducted sequentially on the same day by two different examiners. A week later, the first examiner conducted the third measurement. All subjects underwent three consecutive tests during each session. The repeatability and reproducibility of the modulation transfer function cut off frequency (MTF cutoff), the Strehl ratio, the OQAS values (OVs) at contrasts of 100%, 20% and 9%, and the objective scatter index (OSI) were analyzed. Results For MTF cutoff, Strehl ratio, OV100%, OV20%, OV9%, and OSI, the mean values were 39.32±9.75cpd, 0.22±0.06, 1.31±0.33, 1.33±0.39, 1.33±0.41, 0.60±0.42, respectively. Repeatability and reproducibility were good with a very low coefficient of variation and high interclass correlation coefficients (>0.88) for all parameters. Bland-Altman plots showed good correlation with 95% limits of agreement ranged from -6.04 to 6.78cpd, -0.05 to 0.05, -0.20 to 0.23, -0.29 to 0.32, -0.40 to 0.42, -0.23 to 0.21 in inter-observer, and -6.56 to 7.42cpd, -0.06 to 0.06, -0.22 to 0.24, -0.30 to 0.32, -0.35 to 0.34, -0.24 to 0.23 in inter-visit, respectively. Conclusion The OQASII system yields excellent repeatability and good reproducibility for objective measurements of overall optical quality in clinic.
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Affiliation(s)
- Chen-Chen Xu
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
| | - Ting Xue
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qin-Mei Wang
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yi-Ni Zhou
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jin-Hai Huang
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
| | - A-Yong Yu
- The Eye Hospital of Wenzhou Medical University, Wenzhou, China
- * E-mail:
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Abstract
PURPOSE To analyze objective optical quality changes after pterygium surgical excision using the Optical Quality Analysis System. METHODS Forty eyes with primary pterygium suitable for surgical treatment were included. Uncorrected distance visual acuity, corrected distance visual acuity (CDVA), objective scattering index (OSI), and cutoff frequency of the modulation transfer function (MTFcutoff) were recorded preoperatively and at 1 and 6 months postoperatively. Slit-lamp measurement of pterygium size was performed to classify them: small in group 1 and medium size/large in group 2. A paired comparative study of all data that included preoperative with 1-month results (comparison A), preoperative with 6-month results (comparison B), and 1 month with sixth-month results (comparison C) was performed. RESULTS In global analysis, uncorrected distance visual acuity and OSI showed significant changes in comparison A, all parameters in comparison B, and CDVA, OSI, and MTFcutoff in comparison C. When subdividing into groups, in group 1, there was significant improvement between preoperative uncorrected distance visual acuity value and those at 1 and 6 months. Significant improvement in CDVA, OSI, and MTFcutoff values were observed in comparisons B and C. In group 2, MTFcutoff values significantly improved in comparisons B and C. The comparison of mean values between each group at each evaluation showed a lower value for MTFcutoff at 1 month after surgery. A comparative analysis of the evolution between both groups based on pterygium size did not reveal significant differences. CONCLUSIONS Pterygium can undermine visual quality, and its excision provides significant improvement even at 6 months after surgery. Optical Quality Analysis System proved useful for postoperative outcomes.
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Rzemyk V, Cochener B. [Quality of vision studied by comparative measurement of light scattering]. J Fr Ophtalmol 2014; 37:540-7. [PMID: 25059995 DOI: 10.1016/j.jfo.2014.01.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 12/28/2013] [Accepted: 01/06/2014] [Indexed: 11/29/2022]
Abstract
PURPOSE To assess quality of vision by measuring ocular light scattering with two platforms and comparing them to traditional tests, in healthy subjects and cataract patients. PATIENTS AND METHODS One hundred and sixty-eight eyes divided in two groups were examined by the same clinician in a prospective study (group 1, healthy controls, with a mean age of 31.22 [± 6.76]; and group 2, patients presenting with cataract, with a mean age of 60.36 [± 10.27]). Patients with ocular surface disease were excluded from this study. Each group responded to the VF-14 questionnaire, underwent an examination with lens opacities assessed by LOCS III and a measurement of ocular light scattering with two platforms: the OQAS (Visiometrics(©)) and the C-Quant (Oculus(©)). We analyzed correlations between indices of light scattering with the two platforms (respectively OSI and log(s)) and traditional quality of vision tests (VF-14 questionnaire and LOCS III). RESULTS Strong correlations were found between the OSI and LOCS III. Moderate correlations were found between the OSI and the VF-14 questionnaire, as well as between log(s), VF-14 questionnaire and LOCS III. CONCLUSION Indices of light scattering seems to be valid tools to assess quality of vision, thus lending themselves to routine testing of visual function.
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Affiliation(s)
- V Rzemyk
- Service d'ophtalmologie, CHRU Morvan, 2, avenue Foch, 29200 Brest, France.
| | - B Cochener
- Service d'ophtalmologie, CHRU Morvan, 2, avenue Foch, 29200 Brest, France
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Miao H, He L, Shen Y, Li M, Yu Y, Zhou X. Optical quality and intraocular scattering after femtosecond laser small incision lenticule extraction. J Refract Surg 2014; 30:296-302. [PMID: 24893354 DOI: 10.3928/1081597x-20140415-02] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 02/17/2014] [Indexed: 11/20/2022]
Abstract
PURPOSE To investigate objective optical quality and changes in light scatter after femtosecond laser small incision lenticule extraction (SMILE) for moderate to high myopia correction. METHODS Prospective clinical study of 66 eyes of 66 patients (23 males, 43 females) with a mean age of 28.67 ± 6.62 years, mean spherical refraction of -6.06 ± 1.57 diopters, and mean cylindrical refraction of -0.68 ± 0.46 diopters. Every patient had a 3-month follow-up after a standard SMILE procedure. An optical quality analysis system was used to measure modulation transfer function cutoff frequency (MTFcutoff), Strehl2D ratio, and objective scatter index (OSI). RESULTS At 3 months postoperatively, mean spherical equivalent was 0.03 ± 0.24 diopters and corrected distance visual acuities of all patients were equal to or better than preoperative values, with a mean safety index of 1.12 ± 0.17 (range: 0.80 to 1.50) and mean efficacy index of 1.18 ± 0.21 (range: 0.80 to 1.50). Mean OSI increased from 0.75 preoperatively to 1.09 at 20 days postoperatively (P < .05), and gradually declined to 0.94 at 40 days and 0.82 at 3 months postoperatively (P > .05). MTFcutoff and Strehl2D ratio did not change significantly compared with preoperative values (P > .05). Multiple linear regression analysis revealed that preoperative OSI was significantly correlated with optical quality at 3 months. Patients with less preoperative OSI tended to acquire higher MTFcutoff (b = -8.61) and lower OSI (b = 0.65) (P < .05). CONCLUSIONS SMILE had little impact on retinal image quality after myopia correction. Postoperative OSI showed a temporary increase and then returned to normal.
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Filgueira CP, Sánchez RF, Colombo EM, Vilaseca M, Pujol J, Issolio LA. Discrimination between Surgical and Nonsurgical Nuclear Cataracts Based on ROC Analysis. Curr Eye Res 2014; 39:1187-93. [DOI: 10.3109/02713683.2014.907432] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Retinal-image quality and night-vision performance after alcohol consumption. J Ophthalmol 2014; 2014:704823. [PMID: 24949202 PMCID: PMC3997960 DOI: 10.1155/2014/704823] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 03/15/2014] [Accepted: 03/19/2014] [Indexed: 11/18/2022] Open
Abstract
Purpose. To evaluate the influence of alcohol consumption on the retinal-image quality and visual performance under surrounding low-illumination conditions. Methods. A volunteer sample of 67 subjects was analyzed. Optical quality of the eye was evaluated by means of the Strehl ratio, the Objective Scattering Index (OSI), and the tear-film quality. We used the visual disturbance index (VDI) to evaluate visual performance under low-illumination conditions and we measured the pupil size under these conditions. The tear-film volume was also measured. All measurements were made before and after alcohol consumption and patients were classified into two groups depending on their breath alcohol content (BrAC): low-alcohol (BrAC < 0.25 mg/L) and high-alcohol content (BrAC ≥ 0.25 mg/L). Results. The VDI was significantly higher after alcohol consumption: the higher the BrAC, the higher the deterioration of the visual discrimination capacity. The pupil size increased significantly for the high-BrAC group. Parameters evaluating optical quality deteriorated after alcohol consumption. Conclusion. The visual performance under low-illumination conditions and the retinal-image quality were deteriorated after alcohol consumption, especially for the high-alcohol group. Furthermore, some physiological changes were observed under effects for high-alcohol contents, such as an increase in the pupil size and disturbances in the tear film, which deteriorated optical quality.
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Wee SW, Moon NJ. Clinical evaluation of accommodation and ocular surface stability relevant to visual asthenopia with 3D displays. BMC Ophthalmol 2014; 14:29. [PMID: 24612686 PMCID: PMC3995804 DOI: 10.1186/1471-2415-14-29] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 03/06/2014] [Indexed: 11/16/2022] Open
Abstract
Background To validate the association between accommodation and visual asthenopia by measuring objective accommodative amplitude with the Optical Quality Analysis System (OQAS®, Visiometrics, Terrassa, Spain), and to investigate associations among accommodation, ocular surface instability, and visual asthenopia while viewing 3D displays. Methods Fifteen normal adults without any ocular disease or surgical history watched the same 3D and 2D displays for 30 minutes. Accommodative ability, ocular protection index (OPI), and total ocular symptom scores were evaluated before and after viewing the 3D and 2D displays. Accommodative ability was evaluated by the near point of accommodation (NPA) and OQAS to ensure reliability. The OPI was calculated by dividing the tear breakup time (TBUT) by the interblink interval (IBI). The changes in accommodative ability, OPI, and total ocular symptom scores after viewing 3D and 2D displays were evaluated. Results Accommodative ability evaluated by NPA and OQAS, OPI, and total ocular symptom scores changed significantly after 3D viewing (p = 0.005, 0.003, 0.006, and 0.003, respectively), but yielded no difference after 2D viewing. The objective measurement by OQAS verified the decrease of accommodative ability while viewing 3D displays. The change of NPA, OPI, and total ocular symptom scores after 3D viewing had a significant correlation (p < 0.05), implying direct associations among these factors. Conclusions The decrease of accommodative ability after 3D viewing was validated by both subjective and objective methods in our study. Further, the deterioration of accommodative ability and ocular surface stability may be causative factors of visual asthenopia in individuals viewing 3D displays.
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Affiliation(s)
| | - Nam Ju Moon
- Department of Ophthalmology, College of Medicine, Chung-Ang University Hospital, #224-1, Heukseok-Dong, Dongjak-Gu, Seoul 156-755, Republic of Korea.
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Kobashi H, Kamiya K, Yanome K, Igarashi A, Shimizu K. Longitudinal assessment of optical quality and intraocular scattering using the double-pass instrument in normal eyes and eyes with short tear breakup time. PLoS One 2013; 8:e82427. [PMID: 24324787 PMCID: PMC3855746 DOI: 10.1371/journal.pone.0082427] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 10/23/2013] [Indexed: 11/18/2022] Open
Abstract
Purpose To assess the longitudinal changes in optical quality including intraocular scattering in normal eyes and eyes with short tear breakup time (TBUT). Methods We prospectively examined twenty eyes of 20 healthy subjects, and age-matched twenty eyes of 20 short TBUT subjects. The modulation transfer function (MTF) cutoff frequency, the Strehl ratio, and the objective scattering index (OSI) were quantitatively assessed using an Optical Quality Analysis System. We investigated the changes in these variables measured consecutively at the initial examination, 5, and 10 seconds without blinking. We also compared these variables in eyes with short TBUT with those in normal eyes. Results No significant differences in the MTF cutoff frequency, Strehl ratio, or OSI were detected over a 10-second period in normal eyes. These variables also became significantly degraded even over a 5-second period in eyes with short TBUT (p<0.01). We found significant differences in these variables at 5 and 10 seconds (p<0.05), but none immediately after the blink between normal and short TBUT eyes. Conclusions Optical quality including intraocular scattering deteriorated significantly with time in eyes with short TBUT, whereas we found significant differences over a 10-second period in normal eyes. Eyes with short TBUT showed greater deterioration in optical quality after the blink than normal eyes. The longitudinal assessment of optical quality may be effective in distinguishing eyes with short TBUT from normal eyes.
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Affiliation(s)
- Hidenaga Kobashi
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
| | - Kazutaka Kamiya
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
- * E-mail:
| | - Kyohei Yanome
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
| | - Akihito Igarashi
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
| | - Kimiya Shimizu
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
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Vilaseca M, Arjona M, Pujol J, Peris E, Martínez V. Non-cycloplegic spherical equivalent refraction in adults: comparison of the double-pass system, retinoscopy, subjective refraction and a table-mounted autorefractor. Int J Ophthalmol 2013; 6:618-25. [PMID: 24195036 DOI: 10.3980/j.issn.2222-3959.2013.05.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 08/12/2013] [Indexed: 11/02/2022] Open
Abstract
AIM To evaluate the accuracy of spherical equivalent (SE) estimates of a double-pass system and to compare it with retinoscopy, subjective refraction and a table-mounted autorefractor. METHODS Non-cycloplegic refraction was performed on 125 eyes of 65 healthy adults (age 23.5±3.0 years) from October 2010 to January 2011 using retinoscopy, subjective refraction, autorefraction (Auto kerato-refractometer TOPCON KR-8100, Japan) and a double-pass system (Optical Quality Analysis System, OQAS, Visiometrics S.L., Spain). Nine consecutive measurements with the double-pass system were performed on a subgroup of 22 eyes to assess repeatability. To evaluate the trueness of the OQAS instrument, the SE laboratory bias between the double-pass system and the other techniques was calculated. RESULTS The SE mean coefficient of repeatability obtained was 0.22D. Significant correlations could be established between the OQAS and the SE obtained with retinoscopy (r=0.956, P<0.001), subjective refraction (r=0.955, P<0.001) and autorefraction (r=0.957, P<0.001). The differences in SE between the double-pass system and the other techniques were significant (P<0.001), but lacked clinical relevance except for retinoscopy; Retinoscopy gave more hyperopic values than the double-pass system -0.51±0.50D as well as the subjective refraction -0.23±0.50D; More myopic values were achieved by means of autorefraction 0.24±0.49D. CONCLUSION The double-pass system provides accurate and reliable estimates of the SE that can be used for clinical studies. This technique can determine the correct focus position to assess the ocular optical quality. However, it has a relatively small measuring range in comparison with autorefractors (-8.00 to +5.00D), and requires prior information on the refractive state of the patient.
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Affiliation(s)
- Meritxell Vilaseca
- Centre for Sensors, Instruments and Systems Development (CD6), Technical University of Catalonia, Terrassa, Barcelona 08222, Spain
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Jung HG, Lim TH. The recovery of optical quality after laser vision correction. KOREAN JOURNAL OF OPHTHALMOLOGY 2013; 27:249-55. [PMID: 23908570 PMCID: PMC3730066 DOI: 10.3341/kjo.2013.27.4.249] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 09/04/2012] [Indexed: 11/25/2022] Open
Abstract
Purpose To evaluate the optical quality after laser in situ keratomileusis (LASIK) or serial photorefractive keratectomy (PRK) using a double-pass system and to follow the recovery of optical quality after laser vision correction. Methods This study measured the visual acuity, manifest refraction and optical quality before and one day, one week, one month, and three months after laser vision correction. Optical quality parameters including the modulation transfer function, Strehl ratio and intraocular scattering were evaluated with a double-pass system. Results This study included 51 eyes that underwent LASIK and 57 that underwent PRK. The optical quality three months post-surgery did not differ significantly between these laser vision correction techniques. Furthermore, the preoperative and postoperative optical quality did not differ significantly in either group. Optical quality recovered within one week after LASIK but took between one and three months to recover after PRK. The optical quality of patients in the PRK group seemed to recover slightly more slowly than their uncorrected distance visual acuity. Conclusions Optical quality recovers to the preoperative level after laser vision correction, so laser vision correction is efficacious for correcting myopia. The double-pass system is a useful tool for clinical assessment of optical quality.
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Effect of pupil size on optical quality parameters in astigmatic eyes using a double-pass instrument. BIOMED RESEARCH INTERNATIONAL 2013; 2013:124327. [PMID: 23865038 PMCID: PMC3706062 DOI: 10.1155/2013/124327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 05/29/2013] [Accepted: 06/12/2013] [Indexed: 11/18/2022]
Abstract
PURPOSE To objectively determine the effects of pupil size on optical quality parameters in astigmatic eyes using a double-pass instrument. METHODS We examined twenty-two eyes of 22 healthy volunteers (mean age ± standard deviation, 27.1 ± 2.8 years) who had no ophthalmic diseases other than refractive errors (manifest cylinder ≤ 0.25 diopters (D)). After we fully corrected cycloplegic refraction, we created with-the-rule astigmatism of 1, 2, and 3 diopters in these eyes and then quantitatively assessed the modulation transfer function (MTF) cutoff frequency and the Strehl2D ratio with 2-, 4-, and 6-mm pupil sizes using the Optical Quality Analysis System. RESULTS The MTF cutoff frequency and the Strehl2D ratio decreased significantly as the amount of astigmatism increased at each pupil size (P < 0.001 for 2, 4, and 6 mm, analysis of variance). They also decreased significantly with an increase in pupil size at each diopter of astigmatism (P < 0.001 for 0, 1, 2, and 3 D). Multiple comparisons demonstrated a significant difference between measurements made for a 2-mm pupil and for a 6-mm pupil at each diopter of astigmatism (P < 0.001 for 0, 1, 2, and 3 D, Dunnett test) and those made for a 4-mm pupil and for a 6-mm pupil at each diopter of astigmatism (P < 0.001 for 0 D, P < 0.05 1, 2, and 3 D). CONCLUSIONS Eyes with larger pupils had lower optical quality even when they were astigmatic. It may be necessary to correct the preexisting astigmatism to acquire excellent visual performance, especially in astigmatic eyes with larger pupils.
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van den Berg TJTP, Franssen L, Kruijt B, Coppens JE. History of ocular straylight measurement: A review. Z Med Phys 2012. [PMID: 23182462 DOI: 10.1016/j.zemedi.2012.10.009] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The earliest studies on 'disability glare' date from the early 20(th) century. The condition was defined as the negative effect on visual function of a bright light located at some distance in the visual field. It was found that for larger angles (>1 degree) the functional effect corresponded precisely to the effect of a light with a luminosity equal to that of the light that is perceived spreading around such a bright source. This perceived spreading of light was called straylight and by international standard disability glare was defined as identical to straylight. The phenomenon was recognized in the ophthalmological community as an important aspect of the quality of vision and attempts were made to design instruments to measure it. This must not be confused with instruments that assess light spreading over small distances (<1 degree), as originating from (higher order) aberrations and defocus. In recent years a new instrument has gained acceptance (C-Quant) for objective and controllable assessment of straylight in the clinical setting. This overview provides a sketch of the historical development of straylight measurement, as well as the results of studies on the origins of straylight (or disability glare) in the normal eye, and on findings on cataract (surgery) and corneal conditions.
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Affiliation(s)
- Thomas J T P van den Berg
- Netherlands Institute for Neuroscience, Institute of the Royal Netherlands Academy of Arts and Sciences, Meibergdreef 47, 1105 BA Amsterdam, The Netherlands.
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Barrionuevo PA, Colombo EM, Vilaseca M, Pujol J, Issolio LA. Comparison between an objective and a psychophysical method for the evaluation of intraocular light scattering. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2012; 29:1293-9. [PMID: 22751395 DOI: 10.1364/josaa.29.001293] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this study we present the comparison of the performance of two systems to measure intraocular scattering. Measurements were made by using a psychophysical system based on a brightness comparison method that provides a glare index and a physical system based on the double-pass technique, which gives an objective scatter index by measuring the optical quality of the eye. Three external diffuser filters that simulated different grades of intraocular scattering were used in subjects with normal vision. The two measured indexes showed a graded rise with increasing level of scattering. The discrimination ability obtained for both systems showed that they were able to distinguish among conditions ranging from normal to early cataracts.
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Affiliation(s)
- Pablo Alejandro Barrionuevo
- Instituto de Investigación en Luz, Ambiente y Visión, Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional de Tucumán, San Miguel de Tucumán, Tucumán, Argentina.
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Kamiya K, Umeda K, Kobashi H, Shimizu K, Kawamorita T, Uozato H. Effect of aging on optical quality and intraocular scattering using the double-pass instrument. Curr Eye Res 2012; 37:884-8. [PMID: 22587340 DOI: 10.3109/02713683.2012.688164] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To assess the effect of aging on optical quality in a normal population. METHODS We prospectively examined 100 normal eyes of 100 healthy volunteers (50 men, 50 women; ages, 20-69 years; mean age ± standard deviation, 44.6 ± 15.5 years). We quantitatively assessed the values of MTF cutoff frequency, Strehl ratio, and objective scattering index (OSI), using an Optical Quality Analysis System™ (Visiometrics, Terrassa, Spain). We took these measurements three times each, and the mean value obtained was used for statistical analysis. We investigated the relationships between subject age and these optical quality parameters. RESULTS The mean MTF cutoff frequency, Strehl ratio, and OSI, were 27.76 ± 8.41, 0.17 ± 0.05, and 1.29 ± 0.76 cycles/degree, respectively. We found a significant negative correlation between subject age and MTF cutoff frequency (Pearson's correlation coefficient r = -0.606, p < 0.001), and between age and Strehl ratio (r = -0.649, p < 0.001). We also found a significant positive correlation between subject age and OSI (r = 0.691, p < 0.001). CONCLUSIONS The MTF cutoff frequency and the Strehl ratio are significantly decreased, and the OSI is significantly increased, by aging, indicating that the optical quality of the eye is degraded in older subjects.
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Affiliation(s)
- Kazutaka Kamiya
- Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan.
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Ondategui JC, Vilaseca M, Arjona M, Montasell A, Cardona G, Güell JL, Pujol J. Optical quality after myopic photorefractive keratectomy and laser in situ keratomileusis: comparison using a double-pass system. J Cataract Refract Surg 2012; 38:16-27. [PMID: 22153091 DOI: 10.1016/j.jcrs.2011.07.037] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 07/11/2011] [Accepted: 07/17/2011] [Indexed: 11/26/2022]
Abstract
PURPOSE To use a double-pass system to compare the optical quality after photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for mild to moderate myopia. SETTING Universitat Politècnica de Catalunya, Terrassa, Barcelona Institute of Ocular Microsurgery, Barcelona, Spain. DESIGN Comparative case series. METHODS Optical quality was assessed with a clinical double-pass system preoperatively and 3 months after PRK or LASIK. The modulation transfer function (MTF), retinal image quality parameters (MTF cutoff frequency, Strehl ratio), and intraocular scattering (objective scatter index [OSI]) were calculated. RESULTS This study evaluated 34 eyes that had PRK and 55 eyes that had LASIK. Both PRK and LASIK had a statistically significant impact on retinal image quality, although no significant differences between the techniques were observed. The MTF at 30 cycles per degree decreased by a factor of 1.50 in the PRK group and by a factor of 1.32 in the LASIK group. The MTF cutoff frequency decreased by a factor of 1.04 in the PRK group and by a factor of 1.06 in the LASIK group. The Strehl ratio decreased by a factor of 1.10 and 1.07, respectively. Photorefractive keratectomy and LASIK increased the objective scatter index by factors of 1.48 and 1.57, respectively. Significant correlations between the preoperative refraction and the OSI were found. CONCLUSIONS Retinal image quality was similarly reduced with PRK and LASIK, with no significant differences between the 2 methods. Some PRK patients had a residual refractive error that might have been related to corneal-wound healing still present 3 months postoperatively.
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Affiliation(s)
- Juan C Ondategui
- Universitat Politècnica de Catalunya, Terrassa, Barcelona, Spain
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Nanavaty MA, Spalton DJ, Boyce JF. Influence of different acrylic intraocular lens materials on optical quality of vision in pseudophakic eyes. J Cataract Refract Surg 2011; 37:1230-8. [DOI: 10.1016/j.jcrs.2011.01.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 01/26/2011] [Accepted: 01/26/2011] [Indexed: 11/29/2022]
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To the editor: Intra- and intersession repeatability of a double-pass instrument. Optom Vis Sci 2011; 87:920-1. [PMID: 21045632 DOI: 10.1097/opx.0b013e3181fd2add] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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